How I Met Your Mother Season 9 DVD of How I Met Your Mother, an American sitcom created by Carter Bays and Craig Thomas, premiered on CBS on September 23, 2013,with two episodes, and concluded on March 31, 2014. The show was renewed for the final season on December 21, 2012, after cast member Jason Segel changed his decision to leave the show after Season 8.Cristin Milioti,How I Met Your Mother Season 9 who was revealed as "The Mother" in the Season 8 finale,was promoted to a series regular, the only time How I Met Your Mother added a new regular cast member.Season 9 consists of 24 episodes, each running approximately 22 minutes in length.